Passive Antenna for 2 Way Radios by Manzie R Lawfer, President, 2 Way Radio Express

Published: 22nd January 2010
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Two way radios are a great way for businesses to improve safety, increase efficiency
and boost productivity. However walls and other obstacles can sometimes prevent clear
radio communications throughout a facility.

Consider the passive antenna. A passive antenna is a coaxial cable with an antenna on
both ends. Think about 2 antennas that are connected by a cable. The purpose of a
passive antenna is to provide a path way for radio signals.

For example, a hospital has an Xray room that is equipped with lead lined walls. Two
way radio signals have difficulty penetrating these walls. One end of a passive antenna
(the 1st antenna) is placed outside the room where radio signals can reach it. The other
end of the passive antenna (the 2nd antenna) is placed inside the room. These
antennas and cable provide a path way so radio users can communicate inside and
outside the room.

If a radio user can receive and send signals outside a building but not from inside to
outside: a passive antenna maybe the solution.

A passive antenna does not require any power. A passive antenna usually cost between
$100 - $200. Passive antennas can not be connected by a cable longer than ten feet.
Passive antennas can be used with either UHF or VHF equipment.

VHF radio signals are prone to poor penetration through building walls and other solid
objects. A passive antenna can be an inexpensive solution to this problem.
If penetration is a problem in a large facility more than one passive antenna can be

Typically hand held two way radios have a range of one to two miles. If you are having
difficulty in attaining these distances for select or specific areas a passive antenna may
be your best answer.

Manzie R Lawfer is President of 2 Way Radio Express, a full service two way radio and
radio equipment dealer. He can be reached at or by
phone 800-557-3083.

For more information about 2 Way Radio Express please move

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